4020637646 has 8 divisors (see below), whose sum is σ = 6032280504. Its totient is φ = 2009877480.

The previous prime is 4020637637. The next prime is 4020637661. The reversal of 4020637646 is 6467360204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209165 + ... + 227576.

It is an arithmetic number, because the mean of its divisors is an integer number (754035063).

Almost surely, 2^4020637646 is an apocalyptic number.

4020637646 is a deficient number, since it is larger than the sum of its proper divisors (2011642858).

4020637646 is a wasteful number, since it uses less digits than its factorization.

4020637646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441346.

The product of its (nonzero) digits is 145152, while the sum is 38.

The square root of 4020637646 is about 63408.4982159332. The cubic root of 4020637646 is about 1590.1263886979.

The spelling of 4020637646 in words is "four billion, twenty million, six hundred thirty-seven thousand, six hundred forty-six".